For the Atom debate: remember that an Atom is singularly poor in performance per clock cycle; trimming the power consumption of an x86 isn't a free lunch, so you've got to account for varying performance/MHz ratios on both architectures. And x86 binary compatibility get's very little we can't have now; Debian has FF (make that IceWeasel) and OOo builds, so Skype with video is about the only popular x86-only app I can think of. Wine, too, on second thought, but still...

Unless you want to run a closed OS (Windows or OSX), the atom looks to me like a bad idea in general, and a very bad idea in an N8x0-class device.

Not bogomips, NO!... Other performance metrics, perhaps, but bogomips is not a useful measurement for anything but calibrating a certain delay loop; that's why it's calculated at all. In a given processor family, it's directly proportional to clock speed, so it's also used as a surrogate for clock speed, but never use it for comparing machines of different processor types. (And yes, other (real) benchmarks aren't bad, but then we'll just descend to arguing the merits of various benchmarks... they're not the automatic infusion of objectivity we might wish for.)